Make it clear that kas config contains default values only
This is to avoid confusion like in gitlab-org/charts/gitlab!3877 (comment 2041525802).
The only relevant reference I found is https://gitlab.com/gitlab-org/charts/gitlab/-/blob/master/charts/gitlab/charts/kas/templates/configmap.yaml. I'll fix it to point at the generated md file.
Edited by Mikhail Mazurskiy